Potassium Phosphate, Tribasic → HCID 89962112, compound

Participants

Reaction Conditions

Reaction Steps

SiliaCat DPP-Pd (0.26 mmol/g loading, from Silicycle, 100 mg, 0.67 mmol), ethyl 2-(6-bromobenzo[d]thiazol-2-yl)acetate (described in WO2011/074560, 200 mg, 0.67 mmol), potassium phosphate (348 mg, 2.00 mmol) and (2-fluoropyridin-4-yl)boronic acid (141 mg, 1.00 mmol) in dioxane (5 mL)/water (0.2 mL) were purged with argon for 5 minutes and then heated at 90° C. After 4 hours, the reaction mixture was diluted with water (50 mL), extracted with DCM (3×50 mL), dried over MgSO4, and concentrated under reduced pressure. The residue was purified by silica gel chromatography (0 to 100% ethyl acetate/hexanes over 15 minutes) to give Compound B23a (120 mg, 57% yield) as a brown solid. HPLC: RT=0.95 min (LCMS Method M). MS (ES): m/z=316.9 [M+H]+. 1H NMR (500 MHz, DMSO-d6) δ 8.68 (d, J=1.7 Hz, 1H), 8.35 (d, J=5.2 Hz, 1H), 8.12 (d, J=8.5 Hz, 1H), 8.02 (dd, J=8.5, 1.9 Hz, 1H), 7.81 (d, J=5.2 Hz, 1H), 7.64 (s, 1H), 4.38 (s, 2H), 4.19 (q, J=7.1 Hz, 2H), 1.24 (t, J=7.0 Hz, 3H).

Provenance & Evidence